missing .dll files

After uninstalling the trial of InBoxer anti-spam program, i now get a box displaying the following message every time i go to 'outlook'. The add-in "c:\program files\Inboxer\outlook Add-in\OLW.dll" could not be installed. It goes on to suggest missing .dll files,out of memory etc. How do i get rid of this irritating box?

Thanks VoG for your response, but InBoxer is not listed. There are 3 items: 1) net folders 2)redemption helper outlook extension 3)fax server extension. Do you have any other suggestions please? PS there are 4 administrator accounts on my pc but only ME gets this irritating box!